Functions and control
7.1.5 ˖Protection function
7.1.5.1˖TTC high temperature-preventing protection
Once the machine is started, it can run TTC overheating protection of air-blowing, but air-blowing sensor
malfunction must alarm after 4 minutes during which the compressor is started (during the course of
self-detection, there’s no such limitation)
Sensor detection methods: 100 times (one cycle of procedure run is one time, and about 5ms, detection
method for each time: continuously sampling for 8 times, then order them and take the mean value of the
middle 2 values), take the mean value.
TTC˄ć˅
Abnormal stop
115
Decreasing the frequency rapidly˄1HZ/second˅
110
Decreasing the frequency slowly (1HZ/10seconds)
105
The frequency doesn’t change.
98
Increasing the frequency (1HZ/10second)
95
Increasing the frequency˄1HZ/1second˅
TTC>=115ć lasts for 20 seconds. Overheating protection of air-blowing, alarm malfunction to the indoor,
others don’t last.
Domestic air conditioner
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